Determinants of Nonspecific Response to Treatment in Randomized Controlled Trials of Major Depressive Disorder: A Narrative Review

The authors review the various determinants of nonspecific response to treatment (NSRT) in randomized controlled trials for major depressive disorder (MDD), aiming to identify factors that complicate the design and interpretation of these studies. They discuss the influence of the placebo effect, misdiagnosis, and other variables on trial outcomes, and propose strategies to mitigate these issues, such as standardized training and independent diagnostic confirmation. The review emphasizes the need for uniform definitions and approaches among experts to enhance the development of effective treatments for MDD.